Hou Yin's Rebellion

Hou Yin's Rebellion occurred in 219 AD when Cao Cao's officers Hou Yin and Wei Kai rebelled against their former lord at Wan Castle in Jing Province. Cao Cao sent Cao Ren and Pang De to crush the uprising, and they succeeded in doing so before Guan Yu's reinforcements could arrive.

Uprising
At Wan Castle in southern Jing Province, the people were filled with discontent at the heavy military burden they were being forced to bear. Unable to sit back and watch, Cao Cao's officer Hou Yin worked together with Guan Yu and started a rebellion, capturing the Prefect of Nanyang Dongli Gun. In order to suppress the rebellion, Cao Cao sent Cao Ren and Pang De to recapture Wan Castle. Hou Yin and the other rebels waited for reinforcements from Guan Yu, but were unable to hold out and gave up the castle, being executed before Guan Yu could arrive.